I assume you mean that you want to display, say, 15:15 as -15:15?

It can't be done in the sense of proper time, because you simply
couldn't have -15:15 in real life, so Excel won't let you do it either.
Time in Excel is represented as a decimal number. IE: 15:15 is
interpreted by Excel as 0.635417, so if you were to convert 0.635417 to
-0.635417, the time would actually display as # signs.

The only way to do it would be to convert it to pure text.

If A1 contained 15:15, then cell B1 could have the formula:

="-"&TEXT(A1,"hh:mm")

Which would show *-15:15* in cell B1.


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Cumberland
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If you change the base date to 1904
(Tools|Options|calculation tab|check 1904 date system)
you can see negative times.

But be aware that you may mess up your dates (by 4 years and a day). And
copying cells with dates between two workbooks with different base dates will
cause this same trouble.



tomashruska wrote:

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Dave Peterson